K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2017-09-23T17:48:49.214881Z
K 7
svn:log
V 425
ddb(4): Add 'show badstacks' command to show witness badstacks

Add a DDB command that mirrors sysctl debug.witness.badstacks.

Reapply r323935 after fixing trivial deficiency.  I forgot to compile with
WITNESS enabled.  Thanks emaste@ for fixing the build while I was asleep.

Reported by:	rstone
Reviewed by:	rstone (previous version)
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D12468

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